[patch] updated helpHeadline syntax group in runtime/syntax/help.txt

[Dominique Pellé]

Hi

Attached patch highlights the following titles (which contain digits or
parentheses) with helpHeadline syntax group.

In mbyte.txt:
UTF-8 IN XFREE86 XTERM                                  *UTF8-xterm*
TYPING UTF-8                                            *utf-8-typing*
X INPUT METHOD (XIM) BACKGROUND                 *XIM* *xim* *x-input-method*

In syntax.c:
IA64                            *ia64.vim* *intel-itanium* *ft-ia64-syntax*
XF86CONFIG                              *xf86conf.vim* *ft-xf86conf-syntax*

It makes it more consistent with other highlighted helpHeadline titles.

Regards
-- Dominique

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*** /home/pel/sb/vim-runtime/syntax/help.vim	2007-10-27 20:04:43.000000000 +0200
--- help.vim	2009-05-17 17:02:38.000000000 +0200
***************
*** 8,14 ****
    finish
  endif
  
! syn match helpHeadline		"^[-A-Z .]\+[ \t]\+\*"me=e-1
  syn match helpSectionDelim	"^=\{3,}.*===$"
  syn match helpSectionDelim	"^-\{3,}.*--$"
  syn region helpExample		matchgroup=helpIgnore start=" >$" start="^>$" end="^[^ \t]"me=e-1 end="^<"
--- 8,14 ----
    finish
  endif
  
! syn match helpHeadline		"^[-A-Z .][-A-Z0-9 .()]*[ \t]\+\*"me=e-1
  syn match helpSectionDelim	"^=\{3,}.*===$"
  syn match helpSectionDelim	"^-\{3,}.*--$"
  syn region helpExample		matchgroup=helpIgnore start=" >$" start="^>$" end="^[^ \t]"me=e-1 end="^<"